CN2203246Y - Computerized theft-proof device for car - Google Patents

Abstract

The utility model provides a computerized theft-proof device for automobiles, comprising a cipher input part, a master controller and a relay. The master controller is composed of a multiplex coding device, a trigger, a theft-proof time delay circuit, and a special type wave generator. The relay is composed of an electronic circuit and a field effect tube. The relay is directly connected with the low-voltage side current return circuit of an automobile ignition system in series. According to the cipher input, the master controller controls the relay. When the cipher is input, the relay is switched on. The automobile can be normally started. When the cipher input does not conform to the cipher determined or the automobile encounters robbing, a cipher input button is pressed once. The relay is broken, and the automobile can not be operated. The utility model can be widely used for the theft-proof for various automobiles.

Description

Computerized theft-proof device for car

The utility model relates to a kind of Car Burglar Alarm.Particularly about the automobile computer Car Burglar Alarm.

Automobile burglar generally relies on automobile ignition switch and door lock that automobile is shielded.Key leakage or car door are opened with other method, and the protection of automobile is just ineffective, does the car owner meet when robbing and how about changes from passive to active again?

The purpose of this utility model is to provide a kind of car alarm.Even key is stolen, car door is opened the automobile computer Car Burglar Alarm that all can not steal automobile with other method.

Another purpose of the present utility model is can make automobile at 1-2 minute internal cutting off power supply when automobile is met misfortune, makes the car owner can do emergency handling with leading.

For achieving the above object, the automobile computer Car Burglar Alarm that provides of the utility model.Comprise primary controller, relay, password importation.As shown in Figure 1.It is characterized in that: primary controller is made of multiplex coding device, binary pair, anti-misfortune time delay circuit, extraordinary wave producer.Relay is to be made of electronic circuit and field effect transistor, and it directly is connected in series with automotive ignition system low pressure side current return.Primary controller is by the extraordinary relay of the cipher control of input.When the input password, relay is connected, and automobile can normally start.Meet when pressing a password load button when robbing when the password of input and fixed password not match or automobile, relay disconnects, and automobile can't move.Relay is made of electronic circuit and field effect transistor.Whether relay work, by extraordinary wave producer decision.The password of password importation input is depended in the triggering of extraordinary wave producer, the signal after the multiplex coding device is handled.The multiplex coding device adopts the coder more than three tunnel, arbitrarily inputs password by the car owner, and password can be selected arbitrarily in numeral more than 3.

Advantage of the present utility model is: 1, obtain key with wrongful mode as the ruffian, automobile starting can not be stolen.Password is more than 3, and the password capacity is big, strong security; 2, when the ruffian robs car, the car owner presses password input button one time, through 1-2 minute internal cutting off automotive ignition system, automobile can't be started or stagnation of movement, and the car owner can during this period of time do emergency handling, changes from passive to active; 3, relay directly and the low pressure side current return join, can improve high-tension coil primary return voltage, secondary voltage is reached more than 30000 volts, fuel can be burnt more fully, thereby can save energy about 10%.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a functional block diagram of the present utility model.

Fig. 2 is the schematic circuit diagram of the extraordinary wave producer of the utility model.

Fig. 3 is the schematic circuit diagram of the utility model relay.

Fig. 4 is the anti-time delay circuit schematic diagram of robbing of the utility model.

Referring to Fig. 1,1-imports password key, 2-and door, 3,4, the 5-coder, 6-code processor, 7-binary pair, the extraordinary wave producer of 8-, 9-time delay circuit, 10-password indicating circuit, the extraordinary relay of 11-.During the input password, each road password is imported every about 2 seconds respectively, after password has all been imported, open with door, each road password triggers rest-set flip-flop after code processor is handled, make extraordinary wave producer send extraordinary ripple, start extraordinary relay, the on-off of decision automotive ignition system low pressure side current return.

Extraordinary wave producer 8 is accepted from rest-set flip-flop and anti-output signal of robbing time delay circuit, and the output signal of rest-set flip-flop determines the output state of extraordinary wave producer.

Referring to Fig. 2,1-resistance, 2-electric capacity, 3, the 4-not gate, 5-field effect transistor, 6-diode.When input password when correct, rest-set flip-flop is output as high level, and diode 6 oppositely ends, resistance 1, and electric capacity 2, not gate 3 self-excitation starting of oscillations produce extraordinary ripple, after, the integer 4 anti-phase through not gate, deliver to field effect transistor 5 and carry out voltage gain.This amplifying signal direct control electronic relay, referring to Fig. 3,1-inductance, 2,7-resistance, 3,6,8-electric capacity, 4, the 5-diode, 9-field effect transistor.When the extraordinary ripple signal of electronic relay V end input, through electric capacity 3, diode 4,5, the conducting of direct control field effect transistor behind the ripple is considered in electric capacity 6 rectifications.

In Fig. 4,1,2,5, the 9-not gate, 3, the 6-diode, the 4-RS binary pair, 7,11-resistance, 8-electric capacity, when automobile is met misfortune, click password input button, through not gate 1,2, give 4 one reset signals of binary pair, make rest-set flip-flop be output as low voltage, anti-phase through not gate 5, because the effect of electric capacity 8, among Fig. 4, A point current potential can not suddenly change, thereby reaches time-lag action.Treat that A point current potential rises to high potential, anti-phase through not gate 9, diode 3 conductings for active potential, make extraordinary wave producer failure of oscillation with its anodal current potential pincers, and relay disconnects, and realizes the purpose that the automobile power-down time-delay stops.

Claims (4)

1, a kind of automobile computer Car Burglar Alarm, comprise password importation, primary controller, relay, it is characterized in that: primary controller is made of multiplex coding device, binary pair, anti-misfortune time delay circuit, extraordinary wave producer, relay is to be made of electronic circuit and field effect transistor, and it directly is connected in series with automotive ignition system low pressure side current return.

2, automobile computer Car Burglar Alarm according to claim 1 is characterized in that: the multiplex coding device is to be made of the coder more than three tunnel.

3, automobile computer Car Burglar Alarm according to claim 1 is characterized in that: prevent robbing time delay circuit by 4 not gates and 1 rest-set flip-flop, and 2 resistance and 1 electric capacity, 2 diodes become electric connection to constitute.

4, automobile computer Car Burglar Alarm according to claim 1 is characterized in that: extraordinary wave producer is by 2 not gates and 1 field effect transistor, and 1 resistance, 1 electric capacity become electric connection to constitute with a diode.

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